JPH10142741A - Photographic film cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photographic film cartridge in which chips are prevented from entering the inside of a cartridge main body even when the chips are produced from a catch at the time of coupling the catch with a part to be locked. SOLUTION: A foreign matter flowing-out preventing projection 35b catching the needle-like chips produced when the catch 35 and the part to be locked 37 are engaged is integrally projectingly formed at one chevron inclined surface of the projecting part 35a of the catch 35 so as to form a V-shaped space for catching the chips at the engaged part when the catch 35 is engaged with the part to be locked 37. By forming the projection 35b at one part of the projection part 35a of the catch 35, the chips 60 are caught in the V-shaped space formed by the projection 35b even when the chips 60 are produced due to that one part of the projection part 35a is chipped when the catch 35 is engaged with the part to be locked 37.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic film cartridge in which a cartridge body for accommodating a photographic film is composed of a plurality of plastic molded parts, and these molded parts are combined and integrated.

[0002]

2. Description of the Related Art Conventionally, a photographic film cartridge in which the leading end of the photographic film is wound into the cartridge body when not in use and the photographic film is sent out by rotating a spool when in use. It is provided by the present applicant as an IX240 cartridge film.

In a photographic film cartridge having such a function, for example, as described in Japanese Patent Application Laid-Open No. Hei 8-146561, a cartridge body is composed of two resin molded parts, and these two molded parts are formed of two resin molded parts. The locking claw and the locked portion are integrally connected by a connection. A convex portion is provided at the tip of such a locking claw, and a groove-shaped concave portion fitted with the convex portion is provided at the locked portion. And each is formed so that when the convex part of a locking claw engages with the concave part of a to-be-locked part, the convex part may be pressed toward the concave part.

[0004]

However, in the above-described photographic film cartridge, the projection of the locking claw is pressed toward the recess even after the coupling, so that the tip of the locking claw at the time of assembling is formed. The protruding portion is caught by the locked portion and scraped, and then pushed deep into the recess while being strongly rubbed, so that the tip of the locking claw is sharply and sharply cut off in a needle shape, resulting in generation of shavings.

If the shavings thus generated enter the inside of the cartridge body and adhere to the photographic film, they may cause abrasion on the photographic film. There is a disadvantage that the exposure is not performed.

For this reason, for example, Japanese Patent Application No. 8-24819 is disclosed.
In the case of 0, the locked portion is formed by a locking claw retaining projection arranged in order from the side where the locking claw enters, and a concave portion provided with a projection provided at the tip of the locking claw. The projections and the recesses are formed on the surfaces of the projections and the depressions, and are extended in a row in the direction in which the locking claws enter. Such a photographic film cartridge has been proposed. However, even with a photographic film cartridge having such a ridge, it was difficult to completely eliminate the generation of shavings when the locking claw and the locked portion were engaged.

The present invention has been made in view of such a background, and even if shavings are generated from the locking claw when the locking claw is coupled with the locked portion, the shavings enter the cartridge body. It is an object of the present invention to provide a photographic film cartridge which prevents such a situation.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, a cartridge body for rotatably storing a spool around which a photographic film is wound is provided with an upper case and a lower case formed of plastic. A locking claw integrally formed so as to extend in a plate shape along the peripheral surface of the cartridge body into one of these cases. In a photographic film cartridge in which the upper and lower cases are integrally connected by engaging with a groove-shaped locked portion formed in the other case, a projection is provided at the tip of a locking claw, and A concave portion that fits with the convex portion is provided.
Part of the side surface of the convex portion closer to the base than the tip of the convex portion captures shavings of the convex portion generated during the fitting process between the convex portion and the concave portion, and captures the shavings of the convex portion with the concave portion. The projection is provided with a foreign matter outflow prevention projection to be held.

In the invention described in claim 2, the upper case and the lower case are ultrasonically welded after the locking claw and the locked portion are fitted, and are held by the fitting portion during this bonding. The shavings that have been formed are also welded to the fitting portion during the ultrasonic welding. Claim 3
In the invention described above, the foreign matter outflow prevention protrusion is a ridge that protrudes intermittently in a width direction perpendicular to a direction in which the locking claw extends.

[0010]

FIG. 2 is an external perspective view showing a photographic film cartridge of the present invention, FIG. 3 is an exploded perspective view thereof, and FIG. 4 is a sectional view thereof. The cartridge body 10 of the photo film cartridge 2 includes an upper case 11 and a lower case 12, each of which is formed in a substantially semi-cylindrical shape and made of plastic. A spool 13 is rotatably housed inside the cartridge body 10, and a photographic film 14 is wound around the spool 13 in a roll shape.

Each of the upper and lower cases 11 and 12 has a substantially semi-cylindrical shape, and a port portion 15 is formed at a part thereof so as to project therefrom. Upper case 11 and lower case 12
The light-shielding lid 16 is rotatably fitted into the port portion 15 at the time of fitting. A flat film passage 17 is formed in the light-shielding lid 16, and serves as a passage for the photographic film 14 sent out from the cartridge body 10 when the light-shielding lid 16 is turned to the open position. When the light-shielding lid 16 is rotated to the closed position, the opening (the photo film entrance and exit) formed at the end of the port portion 15 is completely closed, and the inside of the cartridge body 10 is in a light-shielding state.

A projection 18 is formed behind the port portion 15 of the lower case 12. The protrusion 18 is provided on the spool 1
3 is a guide for picking up the leading end of the photographic film 14 wound around 3 and guiding it to the film passage 17.

The flanges 19 and 20 have openings 1 respectively.
9a and 20a are formed. The spool 13 is fitted into a predetermined position of the spool 13 by inserting the spool 13 into the openings 19a and 20a, and is rotatably mounted on the spool 13. A lip 2 is provided on the outer circumference of the flanges 19 and 20.
1 project from each other so as to face each other, and partially surround the outermost periphery of the photo film 14 wound around the spool 13 from both ends.

When the used display component 23 is fitted into the spool 13, the flange 20 locks the clutch claw 24 and the locking hole 25 of the flange 20 with each other when the spool 13 rotates in the film feeding direction. Flange 20
Can be forcibly rotated. When the spool 13 is rotated in the film winding direction, the flange 20 can be freely rotated without engaging the clutch pawl 24 with the engaging hole 25 of the flange 20. Also, the other flange 1
9 remains free to rotate with respect to the spool 13. In addition,
The use display component 23 is integrated with a fan-shaped display plate 23a, and the use state of this photographic film cartridge can be determined by checking the position through a display window formed in the cartridge body 10.

Side ribs 26 are provided on the inner walls of the side surfaces of the upper case 11 and the lower case 12 to restrict the flanges 19 and 20 from spreading out. A sector plate 27 is fixed to the spool 13, and a data disk label 28 is affixed to the surface thereof. A bar code is radially written on the label 28, and the bar code is photoelectrically detected through a window 29 formed on the side surface of the cartridge body 10 when the spool 13 is rotated.

As a result, it is possible to electrically detect the kind information, the number of shots, and the like of the photographic film 14 stored in the cartridge body 10. The label 30 affixed to the cartridge body 10 displays a film type display, a unique number of the cartridge, and the like. Further, the data disk label 28 can be provided directly on the spool 13 by foil pressing.

The spool lock component 31 locks the spool 13 so that it does not rotate when the light shielding cover 16 is turned to the closed position. This lock is released when the light shielding cover 16 moves to the open position. Reference numeral 32 denotes a lock pole integrally formed with the upper case 11, and the light blocking cover 16 is locked by the lock pole 32 when the cover 16 is turned to the closed position. When the photo film cartridge is set in a device such as a camera or a display device, the lock is provided by a light shielding cover 16 provided in the device.
Is released by the release mechanism.

The photographic film 14 is used for the cartridge body 10.
When the film is completely entangled in the photo film 1,
The outermost periphery of 4 is partially wrapped by the lips 21 and 21 of the flanges 19 and 20 to prevent loosening from the spool 13. As a result, when the spool 13 rotates in the feeding direction of the photo film 14, the photo film 14 rotates together with the spool 13.

The side ribs 26 provided on the inner walls of the side surfaces of the upper and lower cases 11 and 12 regulate the flanges 19 and 20 so that they do not spread to each other. , Facing side ribs 26
The spacing between them has been increased. For this reason, when the leading edge of the photo film 14 is scooped up by the projection 18 and then the film 19 advances to the film passage 17, the flanges 19 and 20 slightly spread outward, and the photo film 14
A gutter-shaped curl is made and sent out from between the two.

When the photographic film cartridge is loaded into the camera, the lock pole 32 is operated by a mechanism on the camera side.
After the lock of the light-shielding lid 16 is released, the light-shielding lid 16 is rotated in the opening direction. Thereafter, the spool 13 is driven in the feeding direction, and feeding of the photographic film 14 is started. Lip 2 formed on the outer periphery of flanges 19 and 20
Since the photo films 14 prevent the photo film 14 from being loosened, the photo film 14 rotates together with the spool 13. During this rotation, the leading end of the photographic film 14 is picked up by the projection 18 and guided to the film passage 17.

When the leading end of the photographic film 14 is guided to the film passage 17 in this way, the lips 21 and 21 are pushed out on both sides by the photographic film 14, so that the wrapping of the photographic film 14 at the back of the film passage 17 is released. Since one of the flanges 20 is forcibly rotated in the feeding direction by the engagement between the clutch pawl 24 and the locking hole 25, the force for feeding the photographic film 14 is increased.
Thus, the photo film 14 is sent out of the cartridge body 10.

At the time of rewinding, the spool 13 is rotated in the opposite direction. Since the rear end of the photo film 14 is locked on the spool 13, the photo film 14 is wound into the cartridge body 10 by the reverse rotation of the spool 13. At this time, the flanges 19 and 20 are expanded in the back of the film passage 17, and the photographic film 14 is drawn between the flanges 19 and 20 and wound around the spool 13.

The upper and lower cases 11 and 12 constituting the cartridge body 10 are connected to each other at a front joint and a rear joint. The rear joint is held by fitting a pair of locking claws 33, 34 protruding from the lower case 12 and a pair of locked portions (not shown) provided on the upper case 11, and The front joint is a pair of locking claws 3 provided on both sides of the port portion 15 of the lower case 12.
5 and 36 and a pair of locked portions 37 and 38 provided on both sides of the port portion 15 of the upper case 11, respectively, so as to be held.

The upper and lower cases 11 and 12 are provided with light-shielding walls 39 to 42 protruding from both sides thereof so as to face each other. When connected, these light-shielding walls 39 to 42 rotatably support one end side of the spool 13 and the used display component 23, and make the interior of the room in which the photographic film 14 is stored light-tight. The light-shielding walls 39 to 4 of the cases 11 and 12 are used.
2 is connected to the back side through the inside of the locking claws 33 and 34 and the corresponding locked parts. On such
When assembling the lower cases 11 and 12, the locking claws 33 and 34 on the rear side are first fitted to the locked parts, and then the locking claws 35 and 36 on the front side are fitted to the locked parts 37 and 38. Fit.

FIG. 5 is a partially cutaway view of the photographic film cartridge of the present invention viewed from the side, and FIG. 6 is an enlarged sectional view showing a fitting portion between the locking claw and the locked portion. It is. The locking claw 36 and the locked portion 38 are connected to the locking claw 3.
5 and the locked portion 37, respectively, so that the description of the locking claw 36 and the locked portion 38 is omitted here.

The locking claw 35 protrudes in a plate shape from the outer diameter surface of the lower case 12, and is a claw that is elastic along the normal direction. At the tip of the locking claw 35, a triangular convex portion 35a that fits with the locked portion 37 is formed. The locking claw 35 is formed so as to be pressed toward the locked portion 37 even after the coupling so that the joints on both sides of the port portion 15 are butted together without any gap.

On one of the mountain-shaped slopes of the projection 35a of the locking claw 35, needle-like shavings generated when the locking claw 35 and the locked portion 37 are fitted are captured. The foreign matter outflow prevention protrusions 35b are integrally provided. As shown in FIG. 7, the foreign matter outflow prevention protrusion 35b is formed slightly lower than the height of the convex portion 35a, and the fitting with the locked portion 37 captures shavings at the fitted portion. A V-shaped space is formed.

The locked portion 37 to be fitted with the locking claw 35 having the projection 35a and the foreign matter outflow prevention projection 35b is provided so as to be recessed in a groove shape from the outer diameter contour of the upper case 11. Have been. At its end, a concave portion 37a into which the convex portion 35a of the locking claw 35 and the foreign matter outflow preventing projection 35b are fitted is formed.

As described above, by forming the foreign matter outflow prevention projection 35b on a part of the projection 35a of the locking claw 35, the locking claw 35 and the locked portion 37 are formed as shown in FIG. When the projection 35a is partly shaved during the fitting with the shavings and shavings 60 are generated, the V formed by the foreign matter outflow prevention protrusion 35b is formed.
The shavings 60 are captured in the character-shaped space.

As shown in FIG. 1 (B), when the ultrasonic horn 61 ultrasonically welds the fitting portion between the locking claw 35 and the locked portion 37, the shavings captured are 6
0 is welded to the fitting portion. Thus, it is possible to prevent the shavings 60 from entering the cartridge body and damaging the photographic film 14, or prevent the shavings 60 from scattering into the assembling process of the photographic film cartridge 2 and having an adverse effect.

In this embodiment, the shape of the foreign matter outflow prevention protrusion 35b is a mountain-shaped ridge extending continuously in the width direction of the locking claw 35. As shown in FIG. 8, any shape may be used as long as the foreign matter outflow prevention projection 63b is intermittently provided in the width direction of the locking claw 63, so that the shavings can be captured at the fitting portion.

In the above embodiment, the locked portion is formed integrally with the upper case, and the locking claw is formed integrally with the lower case. However, the present invention is not limited to this. A locking claw may be formed, and a locked portion may be formed on the lower case side.

As the resin material for forming the cartridge body having the above-mentioned structure, a thermoplastic resin material is preferable in view of suitability for mass production and price, and 0.05% to 3.00% by weight of carbon black as a light shielding agent. What is contained may be used. Further, if necessary, such a resin as a lubricant such as silicone oil, an antistatic agent, an inorganic or organic pigment such as titanium oxide, a processing aid such as zinc stearate, an antioxidant, a nucleating agent, a plasticizer, and the like. You may make it contain.

Examples of the resin include polystyrene resin, impact-resistant polystyrene resin, styrene-acrylonitrile copolymer resin, styrene-acrylonitrile-butadiene copolymer resin, polypropylene resin, high-density polyethylene resin, polyethylene terephthalate resin, and polybutylene terephthalate resin. , A polycarbonate resin, a polyvinyl chloride resin or a modified resin thereof is suitable. In particular, when considering dimensional accuracy, physical strength, ultrasonic welding suitability, etc., the melt flow rate is 1.0
Impact-resistant polystyrene resins containing 0.1 to 10% by weight of synthetic rubber of up to 10.0 g / 10 min, preferably 2.0 to 8.0 g / 10 min, particularly preferably 2.5 to 7 g / 10 min are preferred. Other desirable characteristics of this resin include a flexural modulus of 15,000-30,000 kg / cm ² , preferably 1,8000-2, from the viewpoint of preventing deformation.
8,000 kg / cm ^2, particularly preferably 20,000~28,000kg / cm ^2, Vicat softening point (15 kg load) 80 ° C. or more, preferably 85 ° C. or higher, and particularly preferably 90 ° C or higher.

The carbon black contained in such a resin is added to secure light-shielding properties. Examples of the classification according to the carbon black production method include furnace method carbon black, channel method carbon black, thermal method carbon black, and the like, but photographic adverse effects (fog generation, decrease in sensitivity or increase in sensitivity).
Less, or in terms of light shielding, the average particle size is 10 to 80
Furnace carbon black having a thickness of 5 μm and PH 5 to 9 is preferable, and furnace carbon black having a pH of 15 to 50 μm and PH 6 to 8 is particularly preferable.

As commercially available products, for example, carbon black # 20 (B), # 30 (B), # 33 (B), # 40 (B), # 41 (B), # 44 manufactured by Mitsubishi Chemical Corporation
(B), # 45 (B), # 50, # 55, # 100, # 600, # 2200 (B), # 2400 (B), MA
8, MA11, MA100, etc. For overseas products,
For example, Cabot Black Pearls 2, 46, 70, 71, 74, 8
0,81,607 etc., Regal 300,330,400,660,991, SRF-S etc., S
terling 10, SO, V, S, FT-FF, MT-FF and the like. In addition, Ashland Chemical's Uniteel R, BB, 15,102,
3001,3004,3006,3007,3008,3009,3011,3012, XC-3016, XC
-3017, 3020, etc., but not limited thereto.

The particle size of the furnace carbon black is 10
If it is less than μm, the kneading property with the resin is poor, and the light-shielding property and physical strength are deteriorated. Conversely, if it exceeds 100 μm, the dispersion is good but the light-shielding ability is inferior. If the carbon concentration is increased to secure the light-shielding property, the physical strength is reduced and the moldability is deteriorated, so that it is not practical. In addition, many carbon blacks having a pH exceeding the range of 5 to 9 tended to cause photographic adverse effects and could not be used.

In order not to adversely affect the photographic properties of the photographic film, the free sulfur content in the carbon black is 0.6% or less, preferably 0.3% or less, particularly preferably 0.1% or less. It is better to do the following. The content of the cyanide compound is 0.01% or less, preferably 0.005%.
The content is particularly preferably 0.001% or less. Further, the aldehyde compound content is 0.1% or less,
Preferably 0.05% or less, particularly preferably 0.01%
It is as follows. Attention should be paid to the fact that even small amounts of these substances adversely affect photographic properties.

The amount of furnace carbon black added is
From the viewpoint of ensuring light-shielding properties, injection moldability, and securing the physical strength of the cartridge body, the content is preferably 0.05% by weight to 3.00% by weight. If the addition amount of carbon black is less than 0.05% by weight, the light-shielding property is insufficient, and if it exceeds 3.00% by weight, the physical strength of the cartridge body is reduced and the water absorption is increased. Strips etc. occur, poor appearance,
Causes deterioration of surface strength.

As the light-shielding material, an inorganic pigment such as titanium oxide, red iron oxide, calcium carbonate, or an organic dye may be used in addition to carbon black.

As a method for imparting lubricity to the cartridge body, there are a method of adding a lubricant to a resin for molding the same, and a method of applying a lubricant to a molded article. Examples of the lubricant include silicone oils, higher fatty acid amides such as oleic acid amide and erucic acid amide, metal salts of higher fatty acids such as zinc stearate, higher alcohol esters, fatty acid esters of polyhydric alcohol esters, and the like. It is not limited.

As the silicone oil added to the cartridge body, dimethylpolysiloxane and carboxyl-modified silicone oil described in JP-A-62-286043 or JP-A-62-284355 are preferable. The addition amount of silicone oil is 0.05
% To 5.0% by weight, preferably 1.0% to 3.0% by weight
Between%.

If the amount is less than 0.05% by weight, the desired lubricating effect cannot be obtained. If the amount exceeds 5.0% by weight, the resin slips in the screw of the injection molding machine, and not only does the molding cycle become longer, The amount of silicone that exudes on the molded product surface increases, and the exuded oil is transferred to the photographic film inside the cartridge body, causing photographic adverse effects such as hindering the diffusion of the developing solution into the photographic film during photographic film development. I do. Further, in the ultrasonic seal, the adhesion between the upper case and the lower case is reduced.

The silicone oil has a viscosity at 25 ° C. of 1,000 to
It is preferably 60000CS. If the viscosity at 25 ° C. is less than 1000 CS, bleed out is severe, and the photographic performance is affected. If it exceeds 60000CS, the kneadability with the resin is poor and it cannot be used. In addition, various modified silicone oils such as fluorine-modified silicone oil are commercially available in addition to the above, but most of them have an adverse effect on the photographic properties of photographic films. It is. It could not be used for photographic film cartridges because of insufficient lubrication or severe thermal decomposition during injection molding.

As such a resin, for example, # 3350 of K resin, Denkastyrol PSM manufactured by Denki Kagaku Kogyo
991Y-14 or Mitsubishi Polytech YH061-00802 * 1 manufactured by Mitsubishi Chemical Corporation. # 3350 of K resin has a particle diameter of 0.95 μm and a rubber component of 7.3.
It has a weight average molecular weight of 19.35 MW and does not contain carbon black or silicone oil. Denkastyrol PSM991Y-14 has a particle diameter of 1.48 μm, a rubber component of 4.4 to 5.0% by weight, a weight average molecular weight of 20.4 MW, carbon black of 0.5% by weight, and silicone oil of 2.0% by weight. In addition, Mitsubishi Polytec YH061-0080
2 * 1 indicates that the particle diameter is 0.9 μm and the rubber component is 5.7 to
6.4% by weight, the weight average molecular weight is 20.8 MW,
1.0% by weight of carbon black and 2.0% by weight of silicone oil.

Further, in order to prevent the oxidative decomposition of the resin and the like, and to prevent the formation of decomposition products (eg, alcohols, aldehydes, ketones, carboxylic acids, etc.) as adverse substances on the photographic properties of the photographic film, an antioxidant is used. Can be added. Representative examples of the antioxidant are shown below.

(A) phenolic antioxidants vitamin E, vitamin E carboxylate, 6-t-
Butyl-3-methylphenyl derivative, 2,6-di-t
-Butyl-P-cresol, 2.2′-methylenebis-
(4-ethyl-6-t-butylphenol), 4.4 '
-Butylidenebis (6-t-butyl-m-cresol), 4.4'-thiobis (6-t-butyl-m-cresol), 4.4'-dihydroxydiphenylcyclohexane, alkylated bisphenol, styrenated phenol, 6-di-t-butyl-4-methylphenol, n-octadecyl-3- (3'.5'di-t-butyl-4'-hydroxyphenyl) propionate, 2.
2'-methylenebis (4-methyl-6-t-butylphenol), 4,4'-theobis (3-methyl-6-t-
Butylphenol), 4,4'-butylidenebis (3-
Methyl-6-t-butylphenol), stearyl β
(3.5-di-4-butyl-4-hydroxyphenyl)
Propionate, 1,1,3-tris (2-methyl-4
(Hydroxy-5-t-butylphenyl) butane, 1.3
.5-trimethyl-2,4,6-tris (3.5-di-
t-butyl-4hydroxybenzyl) benzene, tetrakis [methylene-3 (3 ′ · 5′-di-t-butyl-
4'-hydroxyphenyl) propionate] methane and the like.

(B) Ketone amine condensation antioxidant 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline, polymer of 2,2.4-trimethyl-1,2-dihydroquinoline, trimethyl Dihydroquinoline derivatives and the like. (C) Allylamine antioxidant phenyl-α-naphthylamine, N-phenyl-β-naphthylamine, N-phenyl-N′-isopropyl-P
-Phenylenediamine, NN'-di-phenyl-P-
Phenylenediamine, NN'-di-β-naphthyl-P
-Phenylenediamine, N- (3'hydroxybutylidene) -1-naphthylamine and the like. (D) Imidazole antioxidants 2-mercaptobenzimidazole, zinc salt of 2-mercaptobenzimidazole, 2-mercaptomethylbenzimidazole and the like.

(E) Phosphite antioxidants: alkylated allyl phosphite, diphenylisodecyl phosphite, tris (nonylphenyl) phosphite sodium phosphite, trinonylphenyl phosphite, triphenyl phosphite and the like. (F) Thiourea-based antioxidants Thiourea derivatives, 1,3-bis (dimethylaminopropyl) -2-thiourea and the like. (G) Other antioxidants useful for air oxidation: dilauryl thiodipropionate.

(H) Hindered phenolic antioxidant 1.3.5-trimethyl-2.4.6-tris (3.5)
-Di-tert-butyl-4-hydroxyverdyl) benzene, tetrakis [methylene (3.5-di-tert)
-Butyl-4-hydroxy-hydrocinnamate)] methane, octadecyl-3,5-di-tert-butyl-
4-hydroxy-hydrocinnamate, 2.2'2 '
-Tris [(3.5-di-tert-butyl-4-hydroxyphenyl) propionyloxy] isocyanurate, tetrakis (2.4-di-tert-butylphenyl) 4.4′-biphenylenediphosphite, 4.
4′-thiobis- (6-tert-butyl-O-cresol), 2.2′-thiobis- (6-tert-butyl-4-methylphenol), tris- (2-methyl-4)
-Hydroxy-5-tert-butylphenyl) butane, 2,2′-methylene-bis- (4-methyl-6-t
tert-butylphenol), 4,4'-methylene-bis- (2.6-di-tert-butylphenol), 4
-4'-butylidenebis- (3-methyl-6-tert
-Butylphenol), 2,6-di-tert-butyl-4-methylphenol, 4-hydroxymethyl-2
6-di-tert-butylphenol, 2,6-di-
tert-4-n-butylphenol, 2,6-bis (2'-hydroxy-3'-tert-butyl-3'-
Methylbenzyl) -4-methylphenol, 4.4'-
Methylene-bis- (6-tert-butyl-O-cresol), 4,4′-butylidenebis- (6-tert-
Butyl-m-cresol). The melting point (Meltingpoi) is low because bleed-out and thermal decomposition are small and the adverse effect on the photographic properties of the photographic film is small.
nt) is preferably 100 ° C. or higher, particularly 120 ° C.
The above are preferred.

Representative commercial antioxidants are shown below. (1) Phenolic antioxidants SUMILIZER BHT (Sumitomo Chemical), IRGAN
OX 1076 (Ciba Geigy), MARK AO-5
0 (Adeka Argus), SUMILIZERBP-7
6 (Sumitomo Chemical), TOMINOX SS (Yoshitomi), IR
GANOX565 (Ciba Geigy), NONOX WS
P (ICI), SANTNOX (Monsanto),
SUMILIZER WX R (Sumitomo Chemical), ANTA
GEGRYSTAL (Kawaguchi), IRGANOX 10
35 (Ciba Geigy), ANTAGE W-400 (Kawaguchi), NOCLIZERNS-6 (Ouchi Shinko), IRG
ANOX 1425WL (Ciba Geigy), MARK
AO-80 (Adeka Argus), SUMILIZER
GA-80 (Sumitomo Chemical), TOPANOLCA (IC
I), MARK AO-30 (Adeka Argus), M
ARK AO-20 (Adeka Argus), IRGAN
OX 3114 (Chiba Geigy), MARK AO-3
30 (Adeka Argus), IRGANOX 1330
(Ciba Geigy), CYANOX 1790 (AC
C), IRGANOX 1010 (Ciba Geigy), M
ARK AO-60 (Adeka Argus), SUMIL
IZER BP-101 (Sumitomo Chemical), TOMINOX
TT (Yoshitomi), etc.

(2) Phosphorus antioxidant IRGAFOS 168 (Ciba-Geigy), MARK
2112 (Adeka Argus), Weston 618
(BorgWarner), MARK PEP-8 (ADEKA
Argus), ULTRANOX 626 (BorgWarner), MARK PEP-24G (Adeka Argus),
MARK PEP-36 (Adeka Argus), HGA
(Sanko) and the like. (3) Thioether-based antioxidants DLTDP “YOSHITOMI” (Yoshitomi), SUMI
LIZER TPL (Sumitomo Chemical), ANTIOX L
(NOF), DMTD "YOSHITOMI" (Yoshitomi),
SUMILIZER TPT (Sumitomo Chemical), ANTIO
XM (NOF), DSTP "YOSHITOMI" (Yoshitomi), SUMILIZER TPS (Sumitomo Chemical), AN
TIOX (NOF), SEENOX 412S (Cipro), MARK AO-412S (Adeka Argus), SUMILIZER TP-D (Sumitomo Chemical), M
ARK AO-23 (Adeka Argus), Sands
TABP-EPQ (sand), IRGAFOS P-B
PQ FF (Ciba Geigy), IRGANOX 122
2 (Ciba Geigy), MARK 329K (Adeka Argus), Weston 399 (Borg Warner), MARK 260 (Adeka Argus), MAR
K 529A (Adeka Argus) and the like. (4) Metal deactivator NAUGARD XL-1 (Uniroyal), MARK
CDA-1 (ADEKA Argus), MARK CDA
-6 (ADEKA Argus), LAGANOXMD-10
24 (Ciba-Geigy), CUNOX (Mitsui Toatsu), etc.

Preferred antioxidants are phenolic antioxidants, and particularly preferred are hindered phenolic antioxidants. Commercially available products include Irganox of Ciba-Geigy and SUMILIZER of Sumitomo Chemical Co., Ltd.
BHT, SUMILIZER BH-76, SUMI
LIZER WX-R, SUMILIZER BP-1
01 and so on.

Also, 2,6-di-t-butyl-p-cresol (BHT), a low volatility, high molecular weight hindered phenol type antioxidant (trade name: Ireganox 101)
0, Ireganox 1075, TopanolCA,
It is effective to use one or more, particularly two or more, such as ionox 330), dilauryl thiodipropionate, distearyl thiopropionate, dialkyl phosphate and the like. However, antioxidants are reducing substances,
Originally, it is a substance that has an adverse effect on photographic film, and it is necessary to select the type and amount of addition in balance with the effect of suppressing the thermal decomposition. Phenolic and phosphorus antioxidants are preferred because they have little adverse effect on the photographic film, such as fogging and abnormal sensitivity. As the phenolic antioxidant, a hindered phenolic antioxidant is particularly preferred. Among the hindered phenolic antioxidants, those having a melting point of 100 ° C. or more, particularly 120 ° C. or more, are preferable. In particular, it is preferable to use two or more phenolic antioxidants and / or phosphorus antioxidants in combination.

Further, when used in combination with carbon black or the like, the antioxidant effect is synergistically exerted. It is preferable to use a phenol-based antioxidant, a phosphorus-based antioxidant, and carbon black in combination because an antioxidant effect is particularly exhibited.

In addition, various antioxidants disclosed on pages 794 to 799 of the Plastic Data Handbook (published by the KK Industrial Research Association) and various antioxidants disclosed on pages 327 to 329 of the Plastic Additives Data Book (KK Chemical Industry Co., Ltd.) Antioxidants and PLASTICS AGE
It is possible to select and use various antioxidants disclosed on pages 211 to 212 of NCYCLOPEDIA Progress Edition 1986 (KK Plastic Age).

A mechanism for preventing the above-described antioxidant from affecting the photographic film will be described.
The oxidative decomposition of the thermoplastic resin increases as the number of CH ₃ branches increases. This is because the amount of oxygen absorption is large.

It is believed that the autoxidation of hydrocarbons proceeds in the following manner once a free radical is formed by dehydration in the presence of oxygen. (1) RH → R (2) R · + O ₂ → RH → ROO (3) ROO + RH → ROOH + R ・ (4) ROOH → RO ・ + ・ OH (5) RO ・ + RH → ROH + R ・ (6) OH + RH → HOH + R In this way, the oxidation of hydrocarbons is stopped at an accelerated rate to produce a large amount of alcohol, aldehyde, acid, and the like, which further react with each other to form a polymer.

In order to prevent the oxidation of hydrocarbons, it is necessary to complete the above-mentioned chain reaction, for which an antioxidant is used. In addition, it is also preferable to add a radical scavenger described below.

The radical scavenger used in the resin of the photographic film cartridge according to the present invention includes 1,1-diphenyl-2-picrylhydrazyl, 1,3,5-triphenylferdazyl, 2,2,6 .6-tetramethyl-4
-High-valent metal salts such as -piperidone-1-oxyl, N- (3-N-oxyanilino-1,3-dimethylbutylidene) -aniline oxide, ferric chloride, diphenylpicrylhydrazine, diphenylamine, hydroquinone , T-butyl catechol, dithiobenzoyl disulfide, p.p'-ditolyl trisulfide, benzoquinone derivatives, nitro compounds, and nitroso compounds. Of these, the use of hydroquinone is particularly preferred. Further, the above radical scavengers may be used alone or in combination of several kinds. The content of the radical scavenger is 1.0
00 to 10,000 ppm.

The antioxidant includes a free radical chain terminator which reacts with and inactivates a free radical (mainly ROO.) Which is a chain propagator and a hydroperoxide ROOH which is a main source of the free radical. There is a peroxide decomposer that decomposes and stabilizes it.

The former includes an alkylphenol-based antioxidant and an aromatic amine-based antioxidant. The latter includes a sulfur-based antioxidant and a phosphorus-based antioxidant.

Since various antioxidants are also reducing agents that adversely affect the photographic film, unless the type and the amount of addition are carefully examined, deterioration of the quality of the photographic film becomes a serious problem.

An antistatic agent can be added to the light-shielding thermoplastic resin used in the photographic film cartridge of the present invention. Representative examples of the antistatic agent are shown below. I. Nonionic (= nonionic) (1) Alkylamine derivative: T-B103 (Matsumoto Yushi), T-B104 (Matsumoto Yushi) Alkyl amide type polyoxyethylene alkylamine: Armostat 3
10 (lion fat) Tertiary amine (laurylamine): Armostat 400
(Lion fat) N, N-bis (2-hydroxyethyl cocoamine): Armostat 410 (Lion fat) Tertiary amine: ANTISTATIC 273C, 273;
273E (Fine Org. Chem) N-hydroxyhexadecyl-di-eth
anol-amine: Berg. P. 654.049 N-hydroxyoctadecyl-di-eth
anol-amine: (National Dis
t. )

(2) Fatty acid amide derivative: TB-11
5 (Matsumoto Yushi), Elegan P100 (Nippon Yushi), Eliq SM-2 (Yoshimura Oil Chemical) hydroxystearic acid amide oxalic acid-N, N'-distearylamide butyl ester: Hoechst polyoxyethylene alkylamide

(3) Ether type polyoxyethylene alkyl ether RO (CH ₂ CH ₂ O) nH polyoxyethylene alkyl phenyl ether Special non-ion type: resist 104, PE 100, 1
16-118 (Daiichi Kogyo Pharmaceutical), Register PE13
2,139 (Daiichi Kogyo Seiyaku Co., Ltd.), Elegan E115, Chemistat 1005 (Nippon Yushi), Erik BM-1 (Yoshimura Oil Chemical), Electrostripper TS, TS2
3,5, EA, EA2,3 (Kao soap)

(4) Polyhydric alcohol ester type glycerin fatty acid ester: mono-, di- or triglyceride such as stearic acid or hydroxystearic acid, monoglycol (Nippon camphor), TB-123 (Matsumoto oil and fat), register 113 (first Kogyo Pharmaceutical) Sorbitan fatty acid ester Special ester: Eryk BS-1 (Yoshimura Oil Chemical) 1-hydroxyethyl-2-dodecylglyoxazoline: British cellophane

II. Anionic (1) Sulfonic acids Alkyl sulfonate RSO ₃ Na Alkylbenzene sulfonate Alkyl sulfate ROSO ₃ Na (2) Phosphate ester type alkyl phosphate

III. Cationic (1) Amide type cation: Resist PE300,4
01, 402, 406, 411 (Daiichi Kogyo Seiyaku) (2) Quaternary ammonium salt quaternary ammonium chloride quaternary ammonium sulfate quaternary ammonium nitrate Katimine CSM-9 (Yoshimura Oil Chemical), CATANAC6
09 (American Gianamide), Denone 314C (Marubishi Yuka), Armostat 300 (Lion Fat), 1
00V (Armor), Electro Stripper ES (Kao Soap), Chemistat 2009A (Nippon Oil & Fats) Stearamido propyl-dimethyl
l-β-hydroxyethyl ammonium
nitrate: CATANAC SN (American Gianamid)

IV. Amphoteric ion system (1) Alkyl petane type (2) Imidazoline type rheostat 53,532 (lion fat), AMS5
3 (by Lion Yushi), AMS303,313 (by Lion Yushi) alkyl imidazoline type (3) a metal salt type AMS576 (by Lion Yushi) Rheostat 826,923 (Lion _{oil) (RNR'CH 2 CH 2 CH 2} NCH 2 COO) 2 Mg
R ≧ C, R '= H or (CH ₂₎ mCOO- (by Lion Yushi) R = C ₃ ~ _N hydrocarbons, A = oxygen or imino group, M =
Organic amine or metal (4) Alkylanine type

V. Conductive resin Polyvinyl benzyl type cation Polyacrylic acid type cation

VI. Others Register 204, 205 (Daiichi Kogyo Seiyaku), Elegan 2E, 100E (Nippon Yushi), Chemistat 100
2,1003,2010 (Nippon Oil & Fats), Elique 51
(Yoshimura Oil Chemical), ALROMINE RV-100 (Geigy) Among the above antistatic agents, nonionic (nonionic) antistatic agents are particularly preferred because of their small adverse effects on photographic properties and human body.

The total amount of one or more of the above-mentioned antistatic agents is 0.001 to 5.0% by weight, preferably 0.1 to 5.0% by weight.
005 to 3.0% by weight. If the addition amount is less than 0.001% by weight, the antistatic effect and the lubricity improving effect are hardly exhibited, and only the kneading cost is increased. On the other hand, if the amount exceeds 5.0% by weight, not only does the effect of increasing the amount hardly exist, but also the bleed-out increases with time and the amount of resin extruded varies greatly due to slippage with the screw, and the layer thickness varies. And other problems occur.

Various types of additives can be selected and contained in accordance with necessary characteristics and intended use without adversely affecting photographic characteristics. Other additives are shown below. (Types of additives) (Typical examples) (1) Plasticizer: phthalate ester, glycol ester, fatty acid ester, phosphate ester, etc. (2) Stabilizer: lead, cadmium, zinc, alkaline earth Metal-based, organic tin-based, etc. (3) Flame retardant: phosphoric acid ester, halogenated phosphoric acid ester, halide, inorganic, phosphorus-containing polyol, etc. (4) Filler: alumina, kaolin, clay, calcium carbonate, Mica, talc, titanium oxide, silica, etc. (5) Reinforcing agent: glass roving, metal fiber, glass fiber, glass milled fiber, carbon fiber, etc. (6) Foaming agent: inorganic foaming agent (ammonia carbonate, sodium bicarbonate), organic (7) Vulcanizing agents: Vulcanization accelerators, accelerators, etc. (8) Deterioration inhibitors: UV absorbers, metal deactivators, peroxide decomposers, etc. (9) Coupling agents: silane, titanate, chromium, aluminum, etc. (10) Various thermoplastic resins, thermoplastic elastomers, synthetic rubbers, etc.

[0075]

EXAMPLES Table 1 shows the results of the generation and outflow test of shavings according to the size of each of the engaging claws of the photographic film cartridge of the present invention. The position of each part is shown in FIG.
It describes in.

[0076]

[Table 1] Magnification of H: Magnification of the difference in height between the tip of the projection and the tip of the foreign matter outflow prevention projection with respect to the average value of the shavings height. (Average height of shavings: 0.105mm) Shavings outflow: The ratio of shavings flowing out of the fitting portion between the locking claw and the locked part. (Unit%) Shavings generated: The ratio of shavings flowing out from the projections of the locking claws. (Unit%) Size of each part of the engaging claw (see FIG. 7) W = 2.0 mm t = 0.75 mm

According to Table 1, the ratio of the height difference between the tip of the projection and the tip of the foreign matter outflow prevention projection to the average value of the height of the shavings is set to 1.2 to 1.8 times. It can be seen that a favorable result can be obtained as a countermeasure against shavings. More preferably, it is good to set to 1.4 to 1.6 times.

[0078]

As described above, according to the present invention, the cartridge body for rotatably storing the spool around which the photographic film is wound is composed of the upper case and the lower case formed of plastic. Then, a locking claw integrally formed so as to extend in a plate shape along the peripheral surface of the cartridge main body is fitted with a groove-shaped cover formed in the other case into which the entire locking claw enters and fits. In the photographic film cartridge in which the upper and lower cases are integrally connected by engaging with a locking portion, a projection is provided at the tip of the locking claw, and a recess is provided in the locked portion to be fitted with the projection, Further, a part of the side of the convex portion closer to the base side than the tip of the convex portion captures shavings of the convex portion generated in the process of fitting the convex portion and the concave portion, and fits the convex portion and the concave portion. Foreign matter outflow prevention projection to be held in the part Since the projection is provided, it is possible to provide a photographic film cartridge in which even if shavings are generated from the locking claw when the locking claw and the locked portion are combined, the shavings are prevented from entering the inside of the cartridge body. .

[Brief description of the drawings]

FIG. 1 shows a photographic film cartridge of the present invention.
It is explanatory drawing of a fitting part.

FIG. 2 is an external perspective view of the photographic film cartridge shown in FIG.

FIG. 3 is an exploded perspective view of the photographic film cartridge shown in FIG.

FIG. 4 is a sectional view of the photographic film cartridge shown in FIG.

FIG. 5 is a partially cutaway view of the photographic film cartridge shown in FIG. 1 when viewed from the side.

FIG. 6 is an enlarged view of a fitting portion in FIG.

FIG. 7 is an enlarged perspective view of an engagement claw.

FIG. 8 is an enlarged perspective view of an engagement claw according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cartridge main body 11 Upper case 12 Lower case 33,34,35,36 Locking claw 35a Convex part 35b Foreign matter outflow prevention protrusion 37,38 Locked part 37a Concave part 60 Shavings

Claims (3)

[Claims] 1. A cartridge body for rotatably storing a spool around which a photo film is wound is composed of an upper case and a lower case formed of plastic, and one of these cases is provided along the peripheral surface of the cartridge body. The locking claw integrally formed so as to extend in a plate shape is engaged with a groove-shaped locked portion formed in the other case into which the entire locking claw enters and is fitted. In a photographic film cartridge in which an upper case and a lower case are integrally connected, a projection is provided at the tip of the locking claw, and a recess is provided at the locked portion to be fitted with the projection. Also, on a part of the side surface of the convex portion on the base side, the shavings of the convex portion generated during the fitting process of the convex portion and the concave portion are captured and held at the fitting portion of the convex portion and the concave portion. Make sure that the projections Photo film cartridge to be butterflies. 2. The upper case and the lower case are ultrasonically welded after the engagement between the locking claw and the locked portion, and shavings held in the fitting portion at the time of this bonding are also removed. 2. A photographic film cartridge according to claim 1, wherein said photographic film cartridge is welded to said fitting portion during said ultrasonic welding. 3. The photographic film cartridge according to claim 1, wherein the foreign matter outflow prevention protrusion is a ridge that protrudes intermittently in a width direction perpendicular to a direction in which the locking claw extends. .